<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<meta name="theme-color" content="#222"><meta name="generator" content="Hexo 6.3.0">

  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png">
  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png">
  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png">
  <link rel="mask-icon" href="/images/logo.svg" color="#222">

<link rel="stylesheet" href="/css/main.css">



<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.1/css/all.min.css" integrity="sha256-Z1K5uhUaJXA7Ll0XrZ/0JhX4lAtZFpT6jkKrEDT0drU=" crossorigin="anonymous">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.1.1/animate.min.css" integrity="sha256-PR7ttpcvz8qrF57fur/yAx1qXMFJeJFiA6pSzWi0OIE=" crossorigin="anonymous">

<script class="next-config" data-name="main" type="application/json">{"hostname":"example.com","root":"/","images":"/images","scheme":"Muse","darkmode":false,"version":"8.14.1","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":false,"style":null},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":false,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":true,"async":false,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"path":"/search.xml","localsearch":{"enable":true,"trigger":"auto","top_n_per_article":-1,"unescape":false,"preload":false}}</script><script src="/js/config.js"></script>

    <meta name="description" content="源码分析 12345678910&#x2F;&#x2F; Use attaches a global middleware to the router. ie. the middleware attached though Use() will be&#x2F;&#x2F; included in the handlers chain for every single request. Even 404, 405, static fil">
<meta property="og:type" content="article">
<meta property="og:title" content="hertz——中间件">
<meta property="og:url" content="http://example.com/2022/12/09/hertz%E2%80%94%E2%80%94%E4%B8%AD%E9%97%B4%E4%BB%B6/index.html">
<meta property="og:site_name" content="JsyBlog">
<meta property="og:description" content="源码分析 12345678910&#x2F;&#x2F; Use attaches a global middleware to the router. ie. the middleware attached though Use() will be&#x2F;&#x2F; included in the handlers chain for every single request. Even 404, 405, static fil">
<meta property="og:locale" content="zh_CN">
<meta property="article:published_time" content="2022-12-09T07:21:02.000Z">
<meta property="article:modified_time" content="2022-12-12T02:12:44.808Z">
<meta property="article:author" content="SongyangJi">
<meta name="twitter:card" content="summary">


<link rel="canonical" href="http://example.com/2022/12/09/hertz%E2%80%94%E2%80%94%E4%B8%AD%E9%97%B4%E4%BB%B6/">



<script class="next-config" data-name="page" type="application/json">{"sidebar":"","isHome":false,"isPost":true,"lang":"zh-CN","comments":true,"permalink":"http://example.com/2022/12/09/hertz%E2%80%94%E2%80%94%E4%B8%AD%E9%97%B4%E4%BB%B6/","path":"2022/12/09/hertz——中间件/","title":"hertz——中间件"}</script>

<script class="next-config" data-name="calendar" type="application/json">""</script>
<title>hertz——中间件 | JsyBlog</title>
  








  <noscript>
    <link rel="stylesheet" href="/css/noscript.css">
  </noscript>
</head>

<body itemscope itemtype="http://schema.org/WebPage" class="use-motion">
  <div class="headband"></div>

  <main class="main">
    <div class="column">
      <header class="header" itemscope itemtype="http://schema.org/WPHeader"><div class="site-brand-container">
  <div class="site-nav-toggle">
    <div class="toggle" aria-label="切换导航栏" role="button">
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
    </div>
  </div>

  <div class="site-meta">

    <a href="/" class="brand" rel="start">
      <i class="logo-line"></i>
      <p class="site-title">JsyBlog</p>
      <i class="logo-line"></i>
    </a>
  </div>

  <div class="site-nav-right">
    <div class="toggle popup-trigger" aria-label="搜索" role="button">
        <i class="fa fa-search fa-fw fa-lg"></i>
    </div>
  </div>
</div>



<nav class="site-nav">
  <ul class="main-menu menu"><li class="menu-item menu-item-home"><a href="/" rel="section"><i class="fa fa-home fa-fw"></i>首页</a></li><li class="menu-item menu-item-tags"><a href="/tags/" rel="section"><i class="fa fa-tags fa-fw"></i>标签</a></li><li class="menu-item menu-item-categories"><a href="/categories/" rel="section"><i class="fa fa-th fa-fw"></i>分类</a></li><li class="menu-item menu-item-archives"><a href="/archives/" rel="section"><i class="fa fa-archive fa-fw"></i>归档</a></li>
      <li class="menu-item menu-item-search">
        <a role="button" class="popup-trigger"><i class="fa fa-search fa-fw"></i>搜索
        </a>
      </li>
  </ul>
</nav>



  <div class="search-pop-overlay">
    <div class="popup search-popup"><div class="search-header">
  <span class="search-icon">
    <i class="fa fa-search"></i>
  </span>
  <div class="search-input-container">
    <input autocomplete="off" autocapitalize="off" maxlength="80"
           placeholder="搜索..." spellcheck="false"
           type="search" class="search-input">
  </div>
  <span class="popup-btn-close" role="button">
    <i class="fa fa-times-circle"></i>
  </span>
</div>
<div class="search-result-container no-result">
  <div class="search-result-icon">
    <i class="fa fa-spinner fa-pulse fa-5x"></i>
  </div>
</div>

    </div>
  </div>

</header>
        
  
  <aside class="sidebar">

    <div class="sidebar-inner sidebar-nav-active sidebar-toc-active">
      <ul class="sidebar-nav">
        <li class="sidebar-nav-toc">
          文章目录
        </li>
        <li class="sidebar-nav-overview">
          站点概览
        </li>
      </ul>

      <div class="sidebar-panel-container">
        <!--noindex-->
        <div class="post-toc-wrap sidebar-panel">
            <div class="post-toc animated"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#demo"><span class="nav-number">1.</span> <span class="nav-text">demo</span></a></li></ol></div>
        </div>
        <!--/noindex-->

        <div class="site-overview-wrap sidebar-panel">
          <div class="site-author animated" itemprop="author" itemscope itemtype="http://schema.org/Person">
  <p class="site-author-name" itemprop="name">SongyangJi</p>
  <div class="site-description" itemprop="description"></div>
</div>
<div class="site-state-wrap animated">
  <nav class="site-state">
      <div class="site-state-item site-state-posts">
        <a href="/archives/">
          <span class="site-state-item-count">251</span>
          <span class="site-state-item-name">日志</span>
        </a>
      </div>
      <div class="site-state-item site-state-categories">
          <a href="/categories/">
        <span class="site-state-item-count">45</span>
        <span class="site-state-item-name">分类</span></a>
      </div>
      <div class="site-state-item site-state-tags">
          <a href="/tags/">
        <span class="site-state-item-count">109</span>
        <span class="site-state-item-name">标签</span></a>
      </div>
  </nav>
</div>

        </div>
      </div>
    </div>

    
  </aside>


    </div>

    <div class="main-inner post posts-expand">


  


<div class="post-block">
  
  

  <article itemscope itemtype="http://schema.org/Article" class="post-content" lang="zh-CN">
    <link itemprop="mainEntityOfPage" href="http://example.com/2022/12/09/hertz%E2%80%94%E2%80%94%E4%B8%AD%E9%97%B4%E4%BB%B6/">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="image" content="/images/avatar.gif">
      <meta itemprop="name" content="SongyangJi">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="JsyBlog">
      <meta itemprop="description" content="">
    </span>

    <span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork">
      <meta itemprop="name" content="hertz——中间件 | JsyBlog">
      <meta itemprop="description" content="">
    </span>
      <header class="post-header">
        <h1 class="post-title" itemprop="name headline">
          hertz——中间件
        </h1>

        <div class="post-meta-container">
          <div class="post-meta">
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-calendar"></i>
      </span>
      <span class="post-meta-item-text">发表于</span>

      <time title="创建时间：2022-12-09 15:21:02" itemprop="dateCreated datePublished" datetime="2022-12-09T15:21:02+08:00">2022-12-09</time>
    </span>
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-calendar-check"></i>
      </span>
      <span class="post-meta-item-text">更新于</span>
      <time title="修改时间：2022-12-12 10:12:44" itemprop="dateModified" datetime="2022-12-12T10:12:44+08:00">2022-12-12</time>
    </span>
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-folder"></i>
      </span>
      <span class="post-meta-item-text">分类于</span>
        <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
          <a href="/categories/hertz/" itemprop="url" rel="index"><span itemprop="name">hertz</span></a>
        </span>
    </span>

  
</div>

        </div>
      </header>

    
    
    
    <div class="post-body" itemprop="articleBody">
        <p>源码分析</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// Use attaches a global middleware to the router. ie. the middleware attached though Use() will be</span></span><br><span class="line"><span class="comment">// included in the handlers chain for every single request. Even 404, 405, static files...</span></span><br><span class="line"><span class="comment">//</span></span><br><span class="line"><span class="comment">// For example, this is the right place for a logger or error management middleware.</span></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="params">(engine *Engine)</span></span> Use(middleware ...app.HandlerFunc) IRoutes &#123;</span><br><span class="line">	engine.RouterGroup.Use(middleware...)</span><br><span class="line">	engine.rebuild404Handlers()</span><br><span class="line">	engine.rebuild405Handlers()</span><br><span class="line">	<span class="keyword">return</span> engine</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">type</span> HandlerFunc <span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *RequestContext)</span></span></span><br></pre></td></tr></table></figure>



<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// HandlersChain defines a HandlerFunc array.</span></span><br><span class="line"><span class="keyword">type</span> HandlersChain []HandlerFunc</span><br></pre></td></tr></table></figure>



<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// Use adds middleware to the group, see example code in GitHub.</span></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="params">(group *RouterGroup)</span></span> Use(middleware ...app.HandlerFunc) IRoutes &#123;</span><br><span class="line">	group.Handlers = <span class="built_in">append</span>(group.Handlers, middleware...)</span><br><span class="line">	<span class="keyword">return</span> group.returnObj()</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>





<p>默认的recover中间件</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// Default creates a hertz instance with default middlewares.</span></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">Default</span><span class="params">(opts ...config.Option)</span></span> *Hertz &#123;</span><br><span class="line">	h := New(opts...)</span><br><span class="line">	h.Use(recovery.Recovery())</span><br><span class="line"></span><br><span class="line">	<span class="keyword">return</span> h</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">// Recovery returns a middleware that recovers from any panic.</span></span><br><span class="line"><span class="comment">// By default, it will print the time, content, and stack information of the error and write a 500.</span></span><br><span class="line"><span class="comment">// Overriding the Config configuration, you can customize the error printing logic.</span></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">Recovery</span><span class="params">(opts ...Option)</span></span> app.HandlerFunc &#123;</span><br><span class="line">	cfg := newOptions(opts...)</span><br><span class="line"></span><br><span class="line">	<span class="keyword">return</span> <span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *app.RequestContext)</span></span> &#123;</span><br><span class="line">		<span class="keyword">defer</span> <span class="function"><span class="keyword">func</span><span class="params">()</span></span> &#123;</span><br><span class="line">			<span class="keyword">if</span> err := <span class="built_in">recover</span>(); err != <span class="literal">nil</span> &#123;</span><br><span class="line">				stack := stack(<span class="number">3</span>)</span><br><span class="line"></span><br><span class="line">				cfg.recoveryHandler(c, ctx, err, stack)</span><br><span class="line">			&#125;</span><br><span class="line">		&#125;()</span><br><span class="line">		ctx.Next(c)</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">// Next should be used only inside middleware.</span></span><br><span class="line"><span class="comment">// It executes the pending handlers in the chain inside the calling handler.</span></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="params">(ctx *RequestContext)</span></span> Next(c context.Context) &#123;</span><br><span class="line">	ctx.index++</span><br><span class="line">	<span class="keyword">for</span> ctx.index &lt; <span class="type">int8</span>(<span class="built_in">len</span>(ctx.handlers)) &#123;</span><br><span class="line">		ctx.handlers[ctx.index](c, ctx)</span><br><span class="line">		ctx.index++</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">func</span> <span class="params">(engine *Engine)</span></span> ServeHTTP(c context.Context, ctx *app.RequestContext) &#123;</span><br><span class="line">	<span class="keyword">if</span> engine.PanicHandler != <span class="literal">nil</span> &#123;</span><br><span class="line">		<span class="keyword">defer</span> engine.recv(ctx)</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	rPath := <span class="type">string</span>(ctx.Request.URI().Path())</span><br><span class="line">	httpMethod := bytesconv.B2s(ctx.Request.Header.Method())</span><br><span class="line">	unescape := <span class="literal">false</span></span><br><span class="line">	<span class="keyword">if</span> engine.options.UseRawPath &#123;</span><br><span class="line">		rPath = <span class="type">string</span>(ctx.Request.URI().PathOriginal())</span><br><span class="line">		unescape = engine.options.UnescapePathValues</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="keyword">if</span> engine.options.RemoveExtraSlash &#123;</span><br><span class="line">		rPath = utils.CleanPath(rPath)</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="comment">// Follow RFC7230#section-5.3</span></span><br><span class="line">	<span class="keyword">if</span> rPath == <span class="string">&quot;&quot;</span> || rPath[<span class="number">0</span>] != <span class="string">&#x27;/&#x27;</span> &#123;</span><br><span class="line">		serveError(c, ctx, consts.StatusBadRequest, default400Body)</span><br><span class="line">		<span class="keyword">return</span></span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="comment">// Find root of the tree for the given HTTP method</span></span><br><span class="line">	t := engine.trees</span><br><span class="line">	paramsPointer := &amp;ctx.Params</span><br><span class="line">	<span class="keyword">for</span> i, tl := <span class="number">0</span>, <span class="built_in">len</span>(t); i &lt; tl; i++ &#123;</span><br><span class="line">		<span class="keyword">if</span> t[i].method != httpMethod &#123;</span><br><span class="line">			<span class="keyword">continue</span></span><br><span class="line">		&#125;</span><br><span class="line">		<span class="comment">// Find route in tree</span></span><br><span class="line">		value := t[i].find(rPath, paramsPointer, unescape)</span><br><span class="line"></span><br><span class="line">		<span class="keyword">if</span> value.handlers != <span class="literal">nil</span> &#123;</span><br><span class="line">			ctx.SetHandlers(value.handlers)</span><br><span class="line">			ctx.SetFullPath(value.fullPath)</span><br><span class="line">			ctx.Next(c)</span><br><span class="line">			<span class="keyword">return</span></span><br><span class="line">		&#125;</span><br><span class="line">		<span class="keyword">if</span> httpMethod != consts.MethodConnect &amp;&amp; rPath != <span class="string">&quot;/&quot;</span> &#123;</span><br><span class="line">			<span class="keyword">if</span> value.tsr &amp;&amp; engine.options.RedirectTrailingSlash &#123;</span><br><span class="line">				redirectTrailingSlash(ctx)</span><br><span class="line">				<span class="keyword">return</span></span><br><span class="line">			&#125;</span><br><span class="line">			<span class="keyword">if</span> engine.options.RedirectFixedPath &amp;&amp; redirectFixedPath(ctx, t[i].root, engine.options.RedirectFixedPath) &#123;</span><br><span class="line">				<span class="keyword">return</span></span><br><span class="line">			&#125;</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="keyword">break</span></span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="keyword">if</span> engine.options.HandleMethodNotAllowed &#123;</span><br><span class="line">		<span class="keyword">for</span> _, tree := <span class="keyword">range</span> engine.trees &#123;</span><br><span class="line">			<span class="keyword">if</span> tree.method == httpMethod &#123;</span><br><span class="line">				<span class="keyword">continue</span></span><br><span class="line">			&#125;</span><br><span class="line">			<span class="keyword">if</span> value := tree.find(rPath, paramsPointer, unescape); value.handlers != <span class="literal">nil</span> &#123;</span><br><span class="line">				ctx.SetHandlers(engine.allNoMethod)</span><br><span class="line">				serveError(c, ctx, consts.StatusMethodNotAllowed, default405Body)</span><br><span class="line">				<span class="keyword">return</span></span><br><span class="line">			&#125;</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;</span><br><span class="line">	ctx.SetHandlers(engine.allNoRoute)</span><br><span class="line">	serveError(c, ctx, consts.StatusNotFound, default404Body)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>





<h1 id="demo"><a href="#demo" class="headerlink" title="demo"></a>demo</h1><p>中间件可以理解为洋葱穿透。</p>
<p>c.Next() 之前的操作是在 Handler 执行之前就执行；<br>c.Next() 之后的操作是在 Handler 执行之后再执行；</p>
<figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// Code generated by hertz generator.</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">package</span> main</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line">    <span class="string">&quot;context&quot;</span></span><br><span class="line">    <span class="string">&quot;fmt&quot;</span></span><br><span class="line">    <span class="string">&quot;github.com/cloudwego/hertz/pkg/app&quot;</span></span><br><span class="line">    <span class="string">&quot;github.com/cloudwego/hertz/pkg/app/server&quot;</span></span><br><span class="line">    <span class="string">&quot;github.com/cloudwego/hertz/pkg/protocol/consts&quot;</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="comment">// customizeRegister registers customize routers.</span></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">customizedRegister</span><span class="params">(h *server.Hertz)</span></span> &#123;</span><br><span class="line">    h.Use(<span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *app.RequestContext)</span></span> &#123;</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello Before 1&quot;</span>)</span><br><span class="line">        ctx.Next(c)</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello After 1&quot;</span>)</span><br><span class="line">    &#125;)</span><br><span class="line">    </span><br><span class="line">    h.Use(<span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *app.RequestContext)</span></span> &#123;</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello Before 2&quot;</span>)</span><br><span class="line">        ctx.Next(c)</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello After 2&quot;</span>)</span><br><span class="line">    &#125;)</span><br><span class="line">    </span><br><span class="line">    h.Any(<span class="string">&quot;/middleware&quot;</span>, <span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *app.RequestContext)</span></span> &#123;</span><br><span class="line">        ctx.String(consts.StatusOK, <span class="string">&quot;hello&quot;</span>)</span><br><span class="line">    &#125;)</span><br><span class="line">    </span><br><span class="line">    h.Use(<span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *app.RequestContext)</span></span> &#123;</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello Before 3&quot;</span>)</span><br><span class="line">        ctx.Next(c)</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello After 3&quot;</span>)</span><br><span class="line">    &#125;)</span><br><span class="line">    </span><br><span class="line">    h.Use(<span class="function"><span class="keyword">func</span><span class="params">(c context.Context, ctx *app.RequestContext)</span></span> &#123;</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello Before 4&quot;</span>)</span><br><span class="line">        ctx.Next(c)</span><br><span class="line">        fmt.Println(<span class="string">&quot;Hello After 4&quot;</span>)</span><br><span class="line">    &#125;)</span><br><span class="line">    </span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



<p>输出结果：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">Hello Before 1</span><br><span class="line">Hello Before 2</span><br><span class="line">to handler</span><br><span class="line">Hello After 2</span><br><span class="line">Hello After 1</span><br></pre></td></tr></table></figure>


    </div>

    
    
    

    <footer class="post-footer">

        

          <div class="post-nav">
            <div class="post-nav-item">
                <a href="/2022/12/09/hertz%E2%80%94%E2%80%94%E8%B7%AF%E7%94%B1/" rel="prev" title="hertz——路由">
                  <i class="fa fa-chevron-left"></i> hertz——路由
                </a>
            </div>
            <div class="post-nav-item">
                <a href="/2022/12/09/GoLang%E2%80%94-%E7%BB%93%E6%9E%84%E4%BD%93/" rel="next" title="GoLang—-结构体">
                  GoLang—-结构体 <i class="fa fa-chevron-right"></i>
                </a>
            </div>
          </div>
    </footer>
  </article>
</div>






</div>
  </main>

  <footer class="footer">
    <div class="footer-inner">


<div class="copyright">
  &copy; 
  <span itemprop="copyrightYear">2023</span>
  <span class="with-love">
    <i class="fa fa-heart"></i>
  </span>
  <span class="author" itemprop="copyrightHolder">SongyangJi</span>
</div>
  <div class="powered-by">由 <a href="https://hexo.io/" rel="noopener" target="_blank">Hexo</a> & <a href="https://theme-next.js.org/muse/" rel="noopener" target="_blank">NexT.Muse</a> 强力驱动
  </div>

    </div>
  </footer>

  
  <div class="toggle sidebar-toggle" role="button">
    <span class="toggle-line"></span>
    <span class="toggle-line"></span>
    <span class="toggle-line"></span>
  </div>
  <div class="sidebar-dimmer"></div>
  <div class="back-to-top" role="button" aria-label="返回顶部">
    <i class="fa fa-arrow-up fa-lg"></i>
    <span>0%</span>
  </div>

<noscript>
  <div class="noscript-warning">Theme NexT works best with JavaScript enabled</div>
</noscript>


  
  <script src="https://cdnjs.cloudflare.com/ajax/libs/animejs/3.2.1/anime.min.js" integrity="sha256-XL2inqUJaslATFnHdJOi9GfQ60on8Wx1C2H8DYiN1xY=" crossorigin="anonymous"></script>
<script src="/js/comments.js"></script><script src="/js/utils.js"></script><script src="/js/motion.js"></script><script src="/js/schemes/muse.js"></script><script src="/js/next-boot.js"></script>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/hexo-generator-searchdb/1.4.1/search.js" integrity="sha256-1kfA5uHPf65M5cphT2dvymhkuyHPQp5A53EGZOnOLmc=" crossorigin="anonymous"></script>
<script src="/js/third-party/search/local-search.js"></script>





  





</body>
</html>
